Issue with deploying Qt applications on playbook

I am just starting BlackBerry native development. So the questions might be silly. I am developing an application which require rich user interface. Hence I googled a bit and found that BlackBerry Native SDK for tablet OS has support for Qt. I downloaded Qt for BlackBerry from github. I created a small window with a hello world label and a text field. I deployed it on my playbook. Everything went all right but the problem is it just takes too much time. Is it normal to take so much time?(like 10 to 15 minutes) And is there a better solution other than using Qt?

Another thing should I be able to use other core features of the native UI while using Qt? Like recording and playing?

For BlackBerry 10 there is the cascade framework integrated with the IDE. Is there something similar for the playbook?Please help me find answers.

Re: Issue with deploying Qt applications on playbook

@John Again forgive me as the question might be silly. In the above mentioned post you said that you kept only the libraries you needed in a separate folder and you set the path in the descriptor.xml file to that folder. How can I find which library files my Qt application uses?

I have another very important query. Suppose I have developed the user interface using Qt. Can I use other core functionalities of the native sdk that interacts with the UI? Suppose I have a button and when I click it a music is to be played. Can I do it with open source audio library supported by the native sdk? Things like handling the orientation of the orientation of the device, multithreading- can all this interact with my UI?